Flat Top Threshold Days by Year (USC00463072)
14 fixed thresholds counted per year at Flat Top (USC00463072): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Flat Top Thresholds
- Flat Top: days with a maximum temperature at or below 0 C (32 F) in 66 years, most in 1977 with 57.
- Flat Top: nights with a minimum temperature at or below 0 C (32 F) in 65 years, most in 1944 with 155.
- Flat Top: nights with a minimum temperature at or below -10 C (14 F) in 65 years, most in 1977 with 53.
- Flat Top: days with 10 mm (0.39 in) or more of precipitation in 65 years, most in 1957 with 53.
- 14 fixed thresholds have at least one qualifying day at Flat Top.
Days at or above 30 C (86 F)
31 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1932 | 1 | 1.8 |
| 1933 | 1 | 1.8 |
| 1934 | 3 | 1.8 |
| 1936 | 2 | 1.8 |
| 1941 | 4 | 2.9 |
| 1942 | 2 | 2.9 |
| 1943 | 4 | 2.9 |
| 1944 | 5 | 2.9 |
| 1945 | 1 | 2.9 |
| 1946 | 1 | 2.9 |
| 1947 | 3 | 2.9 |
| 1948 | 4 | 2.9 |
| 1949 | 2 | 2.9 |
| 1952 | 4 | 3.8 |
| 1953 | 10 | 3.8 |
| 1954 | 4 | 3.8 |
| 1955 | 3 | 3.8 |
| 1957 | 1 | 3.8 |
| 1959 | 1 | 3.8 |
| 1977 | 1 | 1 |
| 1980 | 1 | 6.8 |
| 1983 | 3 | 6.8 |
| 1986 | 1 | 6.8 |
| 1987 | 12 | 6.8 |
| 1988 | 17 | 6.8 |
| 1991 | 1 | 4.8 |
| 1993 | 9 | 4.8 |
| 1994 | 1 | 4.8 |
| 1995 | 10 | 4.8 |
| 1996 | 4 | 4.8 |
| 1998 | 4 | 4.8 |
| Year | First date | Last date |
|---|---|---|
| 1932 | 1932-09-01 | 1932-09-01 |
| 1933 | 1933-07-23 | 1933-07-23 |
| 1934 | 1934-07-21 | 1934-07-26 |
| 1936 | 1936-06-30 | 1936-07-10 |
| 1941 | 1941-05-22 | 1941-09-09 |
| 1942 | 1942-07-17 | 1942-07-18 |
| 1943 | 1943-08-11 | 1943-08-25 |
| 1944 | 1944-06-18 | 1944-08-13 |
| 1945 | 1945-06-30 | 1945-06-30 |
| 1946 | 1946-07-11 | 1946-07-11 |
| 1947 | 1947-06-10 | 1947-06-12 |
| 1948 | 1948-07-05 | 1948-08-29 |
| 1949 | 1949-07-07 | 1949-07-08 |
| 1952 | 1952-06-16 | 1952-07-29 |
| 1953 | 1953-08-16 | 1953-09-30 |
| 1954 | 1954-07-02 | 1954-09-06 |
| 1955 | 1955-08-03 | 1955-08-05 |
| 1957 | 1957-07-08 | 1957-07-08 |
| 1959 | 1959-07-01 | 1959-07-01 |
| 1977 | 1977-07-19 | 1977-07-19 |
| 1980 | 1980-07-17 | 1980-07-17 |
| 1983 | 1983-08-21 | 1983-08-23 |
| 1986 | 1986-07-07 | 1986-07-07 |
| 1987 | 1987-07-23 | 1987-08-23 |
| 1988 | 1988-06-24 | 1988-08-19 |
| 1991 | 1991-08-30 | 1991-08-30 |
| 1993 | 1993-07-06 | 1993-08-31 |
| 1994 | 1994-07-07 | 1994-07-07 |
| 1995 | 1995-07-15 | 1995-09-01 |
| 1996 | 1996-05-20 | 1996-07-18 |
| 1998 | 1998-06-26 | 1998-09-16 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 31 | 17 | 1988 | 4 |
| 90 F (32.2 C): Days | 6 | 3 | 1988 | 1 |
| 0 C (32 F): Ice days (max | 66 | 57 | 1977 | 22 |
| 0 C (32 F): Frost days (min | 65 | 155 | 1944 | 100 |
| -10 C (14 F): Days with min | 65 | 53 | 1977 | 11 |
| -20 C (-4 F): Days with min | 44 | 15 | 1977 | 2 |
| -30 C (-22 F): Days with min | 2 | 2 | 1982 | 2 |
| 20 C (68 F): Tropical nights (min | 33 | 17 | 1936 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 65 | 53 | 1957 | 43 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 65 | 18 | 1957 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 38 | 3 | 1963 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 53 | 11 | 1987 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 12 | 3 | 1987 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 2 | 1 | 1987 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).